Heater for type-setting machines.



W. S. HADAWAY, JR.

HEATER FOR TYPE SETTING MACHINES.

APPLICATION FILED MAR. 26. I9l4.

1 ,284:, 189. Patented Nov. 5, 1918.

2 SHEETSSHEET 1.

/l U /Z 56 I I 4i 1 I l L i /5-/0 5 Mi I; 1 h

' WITIIVESSES Mg (fix 5mm? JZQQM 3. M ma 1 By Q Jr W W ATTORNEY W. S. HADAWAY, JR.

HEATER FOR TYPE SETTING MACHINES.

APPHCATION FlLl-ID MAR. 26, 1914.

Patented Nov. 5, 1918.

2 SHEETSSHEET 2.

A TTOR/VEY I WILLIAM S. HADAVI' JR., F l lEl/"v" RQCHELLE, NEW YORK, ASSIGNOR T0) THE CUTLER- HAMIVEER- IVTFG. (30., @F MILWAUKEE, llVISCG NSEK', A GQEPQEATIGN 0L WISCONEElI'K.

HEATER FUR, TYPE-$ETTENG MACHINES.

Specification of Letters Eatent.

Patented Nov. 5,

Application filed March 26, 1914. Serial No. 827,361,

To all whom it may concern:

Be it known that l, WHJLIAM S. Haoawar,

.JIZ, a citizen of the United States or America, and a resident of New Rochelle, Westchester county, and State of New York, have invented certain new and useful limprovements in'Heaters for Type-Setting Machines, of which the following is a specification, reference being had to the accompany ing drawings, forming a part thereof.

My invention relates to'heaters and particularly to electric heaters for the melting pots of type-setting machines.

One object of my invention is to provide an economical electric heater for linotype crucibles and other. melting pots oi this character. I

Another object is to provide means for supplying heat to the mouth and throat of melting pots of the aforesaid character in addition to maintaining the metal in the body of the pot in a suitable condition.

Another object is to provide a plurality of removable armored electric heaters particularly adapted to be applied to the mouth and throat of a type-setting machine pot, and means for increasing their efiiciency and effectiveness by holding them in position" under pressure;

Another object is to provide a heating appliance for the mouth and throat arranged to impart a relatively large quantity of heat near the mouth of the crucible.

In addition to the foregoing, my invention is applicable directly and without material adaptation to pots of standard construction so that the pots of old machines may be easily equipped with my invention. Otherobjects and advantages of my invention will be set forth hereiiiafter,'and in order that my invention may be thoroughly understood, 1 will now proceed to describe the same in the following specification and then point out the novel features thereoi 1nappended claims.

In the drawings:

Figure 1 is a sectional elevation taken on the line 1-1 ofFig. 2 of atype-settipg machine pot equipped with and embodying my invention. 4

A partially sectional plan view of the same device is shown in Fig. 2.

Figs. 3, 4, 5 and 6 are detail views of the mouth and throat heaters and clamps.

Like characters of reference designate corresponding parts in all the figures.

. 10 is a crucible which is formed in well known manner and has a throat 11, a mouth 12 and a plunger well or socket 13. The crucible is set into a loose jacket 15, the spaces 16 around and beneath the crucible being filled with some suitable heat insulating material such as nonpareil.

The jacket and crucible are closed by a cover hinge-connected by a pin 21 which is supported on lugs 22 of the jacket. A small opening is provided in the cover which is adapted to be closed by a hinge-connected lid or auxiliary cover 23. The covers and 23 have insulatingblocks 24: secured to them by screws or bolts 25 as clearly indicated in Fig. 1 in order to prevent the loss of heat in an upward direction, the side walls and bottom of the crucible being protected by the insulation in the spaces 16. A ring or loop is welded or otherwise secured to the crucible at one side and loosely encircles the bottom of the crucible. Upposit'e this point of attachment it is provided with a lug or thickened portion 32 through which a clamping screw 33 extends.

' depends, a rectangular casing 18. The jacket is provided with legs or supports 19, one of which is indicated in Fig. 1.

-The under surface of the throat 11 is cylindrically curved and an electric heater 40 which is correspondingly curved, is adapted to be held in contact with it by a clamp or shoe 42. The clamp is shown in detail in Fig. 3 and is provided with lugs or ears 43 near its upper end and a single lug 44: near its lower end. llts outer surface is provided with ribs 45 in order to increase its rigidity.

The ring 30 is flattened on one side to permitnot only'the throat heater 40 but also the throat clamp 42 to extend through it, the arrangement of parts being such that when the heater and clamp are in position the lug 14: is directly opposite the screw 33 which acts upon it. By tightening the screw the lower part of the clamp 42 is forced inwardly and holds the adjacent portion of the The heater illustra in partition or inner casing.

heater in close engagement with the cylindrically curved surface of the. throat 11. The clamp is provided'near the .upper end with a transverse rod 50 which extends through the lugs or ears 43 and beyond the sides of thethroat, a pair of eyeb'olts 51 being secured to its ends and-located on the respective sides of the throat. They extend upwardly, as shown in Fig. 1, through holes 53 which are provided for this purpose in another clamping member 54 located over are tightened. As clearly shown in Fig. 2

the nuts 57 are accessible when the cover 20 isopen. In order that access may be had to the screw or bolt 33, a hole 60 is provided in the'side of the jacket 15 through which a i socket wrench or other suitable implement may be thrust, v

In order that the" insulating material,

which fills the spaces 16, may not interfere with the ready removal'of'the heater 40, a

65 is providedadjacent to the throat of the crucible. ,It is suitably spaced from the. crucible to leave room for the clamp 42 and the heater 'Furthermore,abushing 66 of fiber or other "suitable. material is fitted into the hole 60 and extends inwardly to the inner casing 65.

The heaters 40 and 56 may be constructed in any suitable manner; and I prefer to em ploy a heater of-. the so called armored type which is "sealed in sheet metal and hence is not injured if molten metal is thrown into contact with it when the typesetting machine is in service.

Figs. 4 and 5 comprises armor plates 7 0. and 71 which are Y welded together at'their edges and, suitable insulated resistor "strips. 'or ribbons 72; .As clearly shown in Fig. 4 the upper part of theiheater is wider than the lower end, thus more heat is generated close to the mouth of the crucible where heat is obviously most needed. The .heat' generated in both heaters is"quickly'transferred, to the walls of the fcrucible and keeps them at a'suflicient temperature sothat when the molten metal is forced through the relatively narrow opening of the throat it-is maintained in suitable condition for casting.

The hea r 40 is provided with the narrow lead arm '65 which extends materially be- .low the bottom of the jacket, .in order that the terminals may be protected from shortcircuit or injury, any molten metal which ac cidentally flows down the surfaces of the heater being chilled and solidified on the minals.

The terminals themselves are specially designed to permit the removal of the heater,

each; of them comprising a hollow metal rivet WlllCh is substantially flush with the surfaces of the heater., 4

The leadarm 40 is protected by the rec tangular box or casing 18 which inclosesa cooling chamber that is suitably insulated from the hot melting pot.

The metal in the pot'of the crucible may be melted and held at a proper temperature by any suitable means such as, for example,

lead arm before it reaches the exposed tera pair of cylindrically curved heaters 75 and 76, the terminals 77 of which extend erably designed so that either of them is sufficient aloneto melt the metal in the pot and thereby permit the. removal of the other for replacement, orrepairs, it being unlikely that both will be inoperative at the same time. a

-, It is evident from the foregoing that it is laterally outward at the top into a terminal box 78. The two heaters 75 and 76 are'prefonly necessary to'loosen the nuts 57 and the screw 33 in order to, freely remove the mouth and. throat heaters. They may therefore be readily replacedin case they are injured or destroyed.

The immersion heaters. which melt the metal in the crucible, are of course necessarily 'armored in order that the insulation for the resistance conductor may be protected from injury. I have found however,

- that the throat and mouth heaters are subjected to substantially the same hazard by reason of' the'fact'that in operation a considerable amount 'of moltenmetal is likely to be thrown onto. the mouth and throat heaters and adjacent parts by reason ofv the pressure under which the casting process is accomplished.

-The combination of heaters which I employ is particularly efiicient in operation because a large proportion of the heat is genf erated in the immersion heaters where the demandfis greatest and where the loss of heat is least. The body of the melting pot receives new slugs of solid metal to be melted. and 1s most fully protected by the heat, insulation. Furthermore, the metal which surrounds the immersed heaters is frequently igitated byfithe action of the plunger in the well 13 and thereforethe heatersare not coated with oxidized metal which would interfere with the transfer of heat to the metal. Y Attention is particularly directed to the fact that the mouth and throat heaters are arranged to impart a relatively large quantity of heat near the mouth of the crucible and by this means a considerable economy is effected by avoiding the application of unnecessary heat to other places and by the concentration of heat near the mouth or the discharge opening which is at a considerable distance from the body of the crucible and where it is most important to insure a proper temperature of the metal since the molten metal goes directly from the mou h of the crucible to the mold.

My invention is not restricted to the spe cific arrangement shown and described and ii intend that only such limitations be imposed as are indicated in appended claims.

W hat I claim is 1. A heater for type-setting machine mel ing pots comprising a curved throat heater, a mouth heater, and a single means for pressing both heaters into contact with their engaging surfaces,

:2. A heater for type-setting machine melting pots comprising a curved throat heater, a mouth heater, a clamping plate over the mouth heater, a second clamping plate over the throat heater, and a single clamp for forcing the clamping plates against their respective heaters.

3. A heater for type-setting machine melting pots comprising a curved throat heater, a mouth heater, a clamping plate over the mouth heater, a second clamping plate over the throat heater, a single clamp for forcing the clamping plates against their respective heaters, and independent means for forcing one end or the throat clamp into contact with the adjacent end of the throat heater.

i. lln combination with a type-setting machine crucible having a body and a curved throat extension, of a heater unit curved to cooperate with the surface of the throat and wider near the outer end of the throat extension, a correspondingly curved clamp, and means for forcing the clamp inwardly to press the heater agalnst the surface of the crucible.

5. ln combination with a typesetting machine crucible having a body and a curved throat extension, of a pair of heater units adapted to conform to opposite surfaces of the throat clamping plates arranged to engage heaters, and means for forcing clamping plates toward each other to press the heaters against their engaging surfaces.

6. "in combination with a type-settlng machine crucible having a body and a curved throat extension, of a mouth heater above the throat adjacent to the opening, a relatively long throat heater cooperating with the under surface ofthe throat, a clamping plate fitted over the mouth heater and having perforated lugs, a clamping plate titted over the throat heater, a transverse rod secured to the clamp, and tie bolts mounted up i on the respective, ends of the rod and extending on opposite sides of the throat e2:- tension through the perforated lugs of the mouth heater clamp,

F' i combination with a type-setting ma chine crucible havinga body and a curved thro extension, of a mouth heater above the roat adjacent to the opening, a relatively long throat heater cotiperating with the under surface of the throat, a clamping d over the mouth heater and having perforated lugs, a clamping plate titted over the throat heater, a transverse rod secured to the clamp, tie bolts mounted on the respective ends of the rod and extending on opposite sides of the throat extension through the perforated lugson the mouth heater clamp, and means for forcing the lower end of the throat clamp inwardly to press the lower part of the throat heater into contact with the adjacent surface of the crucible,

8. In combination with a type-setting machine crucible having a body and a curved throat extension, of a mouth heater above the throat adjacent to the opening, a relatively long throat heater cooperating with the under surface of the throat, a clamping plate fitted over the mouth heater and ha"- ing perforated lugs, a clamping plate titted over the throat heater, a transverse rod secured to the clamp, a loop secured to the crucible one side and loosely surrounding its lower end, and a clamping screw extcnding inwardly through the loose end of the loop into engagement with the throat clamp to force it inwardly and press the heater against adjacent surface of the crucible.

, 9. A heater for type-setting machine melt ing pots comprising a curved armored throat heater, an armored mouth heater, and means for pressing both heaters into contact with their engaging surfaces.

10. A heater for type-setting machine melting pots comprising a curved armored throat heater, an armored mouth heater, a clamping plate over the mouth heater, a second clamping plate over the throat heater, and a single clamp for forcing the clamping plates against their respective heaters,

ll. A heater for type-setting machine melting pots comprising a curved armored throat heater, an armored mouth heater, a clamping plate over the mouth heater, a second clamping plate over the throat heater, a single clamp for forcing the clamping plates againsttheir respective heaters, and independent means for forcing one end of the throat clamp into contact with the adjacent end of the armoredthroat heater.

12. A heater for type-setting machine melting pots comprising a plurality of curved heaters of difi'erent sizes around the in the molten metal.

well therein, and a curved throat. extension,

of a removable throat heater comprising a body adapted to engage the curved throat extension, and a lead arm extending downwardly beyond the bottom of the crucible. 15. In combination with a type-setting machine crucible .having'a body, a plunger -well therein, and a curved throat extension,

of a removable throat heater comprising a body adapted to engage the curved throat extension and a lead arm extending downwardly beyondthebottom of the crucible, a acket or outer casing for the crucible, and heat insulation within theljacket around the crucible.

'16. In combination with a type-setting machine crucible having a body, a plunger well therein, and a curved throat extension, of a removable throat heater comprising a body adapted to engage the curved throat extension and alead arm extending downwardly beyond the bottom of the crucible,

a jacket or outer casing for the crucible, a

removable clamp within jacket and adapted to press the body of the heater into contact with the adjacent surface of the crucible, and heat insulation within the jacket around the crucible and its heater.

17, A heater for type-setting machine cruclbles comprising a throat heater, a loop secured to the crucible at one side and loosely surrounding its lower end, a clamping shoe for the heater extending through the opening in the loop, and a clamping bolt screwed inwardly through the loose end of the loop into 'engagement with the clamping shoe to force the shoe inwardly and press the heater against the adjacent surface of the crucible.

18. A heater for type setting machine melting pots comprising a heater in the molten metal in the body of the pot, and means for imparting heat to the outlet of the pot. t I

19. in combination with a type setting machine crucible having a body, a plunger well therein, and a threat extension, of an electric heater in the pet around the plunger well in contact with the molten metal therein, and means for imparting heat to the mouth and throat. j

20. combination with a machine crucible having a body, a plunger well therein and. a threat extension, of armored electric heater the pot around i the plunger well in contact with the molten ing pots comprising a heater for the l'l'lG metal therein, and an external electric heater for imparting heat to'the mouth and throat.

21. In combination with a type setting machine crucible having a'body, a plunger well therein and a throat extension, of an armored electric heater in the molten metal I in the potaround the plunger well, and an external electric heater adapted to impart heat to the mouth and throat and arranged to impart a. greater quantity of heat near the outlet of the crucible. 22. In combination with a type setting machine crucible having a body, a plunger well thereinand a throat extension, of an electric heater inthe molten metal in the pot around the plunger well, an external heater for the throat, and an electric heater I for applying additional heat near the mouth.

23. A heatin appliance for a'type setting machine cruci le comprising an electric throat'heating means arranged to apply a greater quantity of heat near the outlet of the crucible.

24. A heating appliance for a type setting machine crucible comprising an electric heater adapted to impart heat to the throat of the crucible' and having a greater heat generating capacity near the mouth of the crucible. I

25L A heating appliance for a type setting machine crucible comprising an electric heater adapted to impart heat to the throat of the crucible, and means for imparting additional heat near the mouth of the crucible. 26. A heating appliance for a type setting machine crucible comprising an electric .heater adapted to impart heat to the throat' of the crucible, and an additional heater for imparting heat near the mouth of the crucible.

27. In combination with a type setting machine crucible having a body, a plunger well therein, and a throat extension, of an electric heater in the molten metal in the pot around the plunger well.

28. A heater for typesetting l1'l2" 1lll6 melting pots comprising a throat h mouth heater, and means for press heaters into contact w'th their faces.

29. A heater for typesettin machine the body of the pot, a heater adapted tc iinpart heat to the throat of the crucible, and a mouth heater.

30. A heater a typesettin melting pot comprising a heater i. metal in the body of the "pot and d' therein, and means for imparting the throat and men I The combin crucible metal, and heatin tending suficiently near the top of the metal In witness whereof I have hereunto set to prevent melting of the type metal at the my hand in the presence of two subscribing l hottomThefore it bis melted a; the top. witnesses, this 24 day of March 1914,

32. he com ination 0 a typesetting I i T 1 7 machine crucible adapted to contain type VVILLMLM HADAWAE metal, and heating means Within the crucible Vfitnesses: arranged in the type metal and adapted to R. J. DEARBORN) impart its heat thereto. 1*. GRAVES 

